Fungalpedia – Note 800, Gonatobotrys

 

Gonatobotrys Corda

Citation when using this data: Huang SK et al. 2021 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1

Classification: Ceratostomataceae, Melanosporales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Saprobic on wood or vegetation. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Mycelium composed of hyaline to light brown, superficial, effused, smooth-walled, branched, septate hyphae. Conidiophores mononematous, macronematous, hyaline, erect, septate, branched or unbranched, smooth-walled. Conidiogenous cells terminal to intercalary, polyblastic, globose to subglobose, hyaline to pale brown, swollen. Conidia solitary, obovoid to ellipsoidal, with a raised rim at base, 0–multi-septate, holoblastic, hyaline to pale brown, smooth to verrucose, conidial secession with conspicuous denticles on the conidia and conidiogenous cells (adapted from Hoch 1977, Walker & Minter 1981, Whaley & Barnett 1963).

Notes – Gonatobotrys was introduced by Corda (1839), and is well known as fungicolous hyphomycetes of Alternaria and Fusarium species (Hoch 1977, Walker & Minter 1981, Whaley & Barnett 1963). The type species Gonatobotrys simplex was considered as the asexual morph of Melanospora damnosa, and was synonymised as M. simplex (Vakili 1989, Réblová et al. 2016). However, Crous et al. (2020b) proposed that characters of hyphomycetous Gonatobotrys were never observed in Melanospora cultures. Melanospora damnosa is distinct from G. simplex based on phylogenetic results (Vu et al. 2019, Crous et al. 2020b). In this study, Gonatobotrys is sister to Vittatispora (56%ML/0.97BY) in Ceratostomataceae, but distinct from Melanospora clade based on multi-gene phylogeny. Therefore, we accept Gonatobotrys as a genus in Ceratostomataceae.

Type species: Gonatobotrys simplex Corda, Prachtflora: 9 (1839). 

Other accepted species: Species Fungorum – search Gonatobotrys.

 

image

 

Figure 1 – Gonatobotrys simplex: (PDD-47724). a Material label. b Dry culture. c Mycelium. d Branched hyphae. e–g Conidiophore with conidia (g is strained in Congo red reagent). h Conidia. Scale bars: d = 200 µm, e–g = 20 µm, h = 10 µm.

 

References

Corda ACJ. 1839 – Pracht – Flora. Europaeischer Schimmel-Bildungen. G. Fleischer.

Crous PW, Wingfield MJ, Schumacher RK, Akulov A et al. 2020b – New and interesting fungi. 3. Fungal Systematics and Evolution 6, 157–231.

Hoch H. 1977 – Mycoparasitic relationships: Gonatobotrys simplex parasitic on Alternaria tenuis. Phytopathology 67(19771), 309–314.

Réblová M, Miller AN, Rossman AY, Seifert KA et al. 2016 – Recommendations for competing sexual-asexually typified generic names in Sordariomycetes (except Diaporthales, Hypocreales, and Magnaporthales). IMA fungus 7(1), 131–153.

Vakili NG. 1989 – Gonatobotrys simplex and its teleomorph, Melanospora damnosa. Mycological Research 93(1), 67–74.

Vu D, Groenewald M, De Vries M, Gehrmann T et al. 2019 – Large-scale generation and analysis of filamentous fungal DNA barcodes boosts coverage for kingdom fungi and reveals thresholds for fungal species and higher taxon delimitation. Studies in mycology 92, 135–154.

Walker JC, Minter DW. 1981 – Taxonomy of Nematogonum, Gonatobotrys, Gonatobotryum and Gonatorrhodiella. Transactions of the British Mycological Society 77(2), 299–319.

Whaley JW, Barnett H. 1963 – Parasitism and nutrition of Gonatobotrys simplex. Mycologia 55(2), 199–210.

 

 

Entry by

Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China

 

Published online 14 September 2021

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